COMPARATIVE ANALYSIS OF THE QUALITY OF LASER DOPPLER SYSTEMS USING MAXIMUM LIKELIHOOD AND PHASE INCREMENT METHODS
V. S. Sobolev, G. A. Kashcheeva, F. A. Zhuravel'
Institute of Automation and Electrometry SB RAS, pr. Akademika Koptyuga 1, Novosibirsk 630090
Keywords: лазерные доплеровские измерительные системы, оптимальные методы обработки сигналов, максимально правдоподобные оценки, laser Doppler measuring systems, optimal methods of signal processing, most plausible estimates
Abstract
This paper presents a comparative analysis of the errors of two alternative methods of estimating the central frequency of signals of laser Doppler systems, one of which is based on the maximum likelihood criterion, and the other on the so-called pulse-pair technique. Using computer simulation, the standard of the Doppler signal frequency from its true values are determined for both methods and graphs of these deviations are constructed as a measure of the accuracy gain of one of them. The results will enable developers of appropriate systems to choose an optimal algorithm of signal processing based on a compromise between the accuracy and speed of the systems as well as the labor intensity of calculations.
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